Question

what is other name for trophoblastic cells lying over the embryonic disc​

Answer 1

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Trophoblasts (from the Greek words trephein, to feed, and blastos, germinator) are cells that form the outer layer of a blastocyst. These cells provide nutrients to the embryo and develop into a large part of the placentas other name for trophoblastic cells lying over the embryonic disc

Answer 2

The other name for trophoblastic cells lying over the embryonic disc  are cytotrophoblast and Syncitotrophoblast.

Explanation:

During embryonic development a gathering of cells shapes into an inward cell mass, which is destined to turn into the fetus. The cells that structure the external shell are called Trophoblast.

During embryo formation, the embryonic disc leaves sufficient space such that the amniotic cavity and yolk sac may develop in that space. The cells called are cytotrophoblast and Syncitotrophoblast are collectively called as Trophoblast.